Package bitronix.tm.resource.jdbc

Class LruStatementCache

java.lang.Object
bitronix.tm.resource.jdbc.LruStatementCache
public class LruStatementCache extends Object
Last Recently Used PreparedStatement cache with eviction listeners support implementation.
Author:
lorban, brettw

  • Constructor Details

    • LruStatementCache

      public LruStatementCache(int maxSize)

  • Method Details

    • get

      public JdbcPreparedStatementHandle get(JdbcPreparedStatementHandle key)
      The provided key is just a 'shell' JdbcPreparedStatementHandle, it comes in with no actual 'delegate' PreparedStatement. However, it contains all other pertinent information such as SQL statement, autogeneratedkeys flag, cursor holdability, etc. See the equals() method in the JdbcPreparedStatementHandle class. It is a complete key for a cached statement. If there is a matching cached PreparedStatement, it will be set as the delegate in the provided JdbcPreparedStatementHandle.
      Parameters:
      key - the cache key
      Returns:
      the cached JdbcPreparedStatementHandle statement, or null

    • put

      public JdbcPreparedStatementHandle put(JdbcPreparedStatementHandle key)
      A statement is put into the cache. This is called when a statement is first prepared and also when a statement is closed (by the client). A "closed" statement has it's usage counter decremented in the cache.
      Parameters:
      key - a prepared statement handle
      Returns:
      a prepared statement

    • clear

      protected void clear()
      Evict all statements from the cache. This likely happens on connection close.

    • addEvictionListener

      public void addEvictionListener(LruEvictionListener listener)

    • removeEvictionListener

      public void removeEvictionListener(LruEvictionListener listener)